luke/iverilog
1
0
Fork 0
mirror of https://github.com/steveicarus/iverilog.git synced 2026-08-22 13:57:18 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add support for structural multiply in t-dll.

Browse Source 
Add code generators and vvp support for both
 structural and behavioral multiply.
This commit is contained in:
steve
2001-06-16 23:45:05 +00:00
parent 63a02d1c0a
commit 4b82d26f5e
19 changed files with 344 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files
vvp/arith.cc
+57 -3
View File
@@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: arith.cc,v 1.4 2001/06/16 03:36:03 steve Exp $"
#ident "$Id: arith.cc,v 1.5 2001/06/16 23:45:05 steve Exp $"
#endif
# include "arith.h"
@@ -48,6 +48,55 @@ void vvp_arith_::output_x_(bool push)
}
}
vvp_arith_mult::vvp_arith_mult(vvp_ipoint_t b, unsigned w)
: vvp_arith_(b, w)
{
}
void vvp_arith_mult::set(vvp_ipoint_t i, functor_t f, bool push)
{
assert(wid_ <= 8*sizeof(unsigned long));
unsigned long a = 0, b = 0;
for (unsigned idx = 0 ; idx < wid_ ; idx += 1) {
vvp_ipoint_t ptr = ipoint_index(base_,idx);
functor_t obj = functor_index(ptr);
unsigned ival = obj->ival;
if (ival & 0xaa) {
output_x_(push);
return;
}
if (ival & 0x01)
a += 1 << idx;
if (ival & 0x04)
b += 1 << idx;
}
unsigned long sum = a * b;
for (unsigned idx = 0 ; idx < wid_ ; idx += 1) {
vvp_ipoint_t ptr = ipoint_index(base_,idx);
functor_t obj = functor_index(ptr);
unsigned oval = sum & 1;
sum >>= 1;
if (obj->oval == oval)
continue;
obj->oval = oval;
if (push)
functor_propagate(ptr);
else
schedule_functor(ptr, 0);
}
}
vvp_arith_sum::vvp_arith_sum(vvp_ipoint_t b, unsigned w)
: vvp_arith_(b, w)
{
@@ -55,7 +104,7 @@ vvp_arith_sum::vvp_arith_sum(vvp_ipoint_t b, unsigned w)
void vvp_arith_sum::set(vvp_ipoint_t i, functor_t f, bool push)
{
assert(wid_ <= sizeof(unsigned long));
assert(wid_ <= 8*sizeof(unsigned long));
unsigned long sum = 0;
@@ -108,7 +157,7 @@ vvp_arith_sub::vvp_arith_sub(vvp_ipoint_t b, unsigned w)
void vvp_arith_sub::set(vvp_ipoint_t i, functor_t f, bool push)
{
assert(wid_ <= sizeof(unsigned long));
assert(wid_ <= 8*sizeof(unsigned long));
unsigned long sum = 0;
@@ -242,6 +291,11 @@ void vvp_cmp_gt::set(vvp_ipoint_t i, functor_t f, bool push)
/*
* $Log: arith.cc,v $
* Revision 1.5 2001/06/16 23:45:05 steve
* Add support for structural multiply in t-dll.
* Add code generators and vvp support for both
* structural and behavioral multiply.
*
* Revision 1.4 2001/06/16 03:36:03 steve
* Relax width restriction for structural comparators.
*